I would like to change the instrument in the Usage Example Time series API for .NET from EUR= to AAPL.O

But I get an empty result set. Why?

The same if I use a fund, e.g. LP40114117.

        public void Launch()
        {
            Console.WriteLine("[3] Time series subscription example");
            Console.WriteLine("");
            
            subscription = timeSeries.SetupDataSubscription("AAPL.O") 
                .WithView("BID")//BID
                .WithAllFields()
                .WithInterval(CommonInterval.Daily)  
                .From(DateTime.Today)   
                .OnDataReceived(DataReceivedCallback)
                .OnDataUpdated(DataUpdatedCallback)
                .CreateAndStart();
        }


        private void DataReceivedCallback(DataChunk chunk)
        {
            foreach (IBarData bar in chunk.Records.ToBarRecords())
            {
                if (bar.Open.HasValue && bar.High.HasValue && bar.Low.HasValue && bar.Close.HasValue && bar.Timestamp.HasValue)
                {
                    Console.WriteLine(
                        "{0}: EUR= OHLC {1} {2} {3} {4}",
                        bar.Timestamp.Value.ToLongTimeString(),
                        bar.Open.Value.ToString("##.0000"),
                        bar.High.Value.ToString("##.0000"),
                        bar.Low.Value.ToString("##.0000"),
                        bar.Close.Value.ToString("##.0000")
                    );
                };
            }
        }